I'm pretty sure that all the RS's have a DOHC. As for the LS and S, I have no idea how Isuzu made that decision. You can tell on the VIN what a truck has by the 8th number/letter. If it is a V - 6VD1-V SOHC, and if it is a W - 6VD1-W DOHC.


Stefan Doerr
'94 Trooper LS
6.5" lift, 33's, G80 and other stuff
http://community.webshots.com/user/smd94trooper